Moreno-Ibanez , M , Silber , E A , Gritsevich , M & Trigo-Rodriguez , J M 2018 , ' Verification of the Flow Regimes Based on High-fidelity Observations of Bright Meteors ' , Astrophysical Journal , vol. 863 , no. 2 , 174 . https://doi.org/10.3847/1538-4357/aad334
Title: | Verification of the Flow Regimes Based on High-fidelity Observations of Bright Meteors |
Author: | Moreno-Ibanez, Manuel; Silber, Elizabeth A.; Gritsevich, Maria; Trigo-Rodriguez, Josep M. |
Contributor organization: | Department of Physics |
Date: | 2018-08-20 |
Language: | eng |
Number of pages: | 16 |
Belongs to series: | Astrophysical Journal |
ISSN: | 0004-637X |
DOI: | https://doi.org/10.3847/1538-4357/aad334 |
URI: | http://hdl.handle.net/10138/241230 |
Abstract: | Infrasound monitoring has proved to be effective in detection of meteor-generated shock waves. When combined with optical observations of meteors, this technique is also reliable for detecting centimeter-sized meteoroids that usually ablate at high altitudes, thus offering relevant clues that open the exploration of the meteoroid flight regimes. Since a shock wave is formed as a result of a passage of the meteoroid through the atmosphere, the knowledge of the physical parameters of the surrounding gas around the meteoroid surface can be used to determine the meteor flow regime. This study analyzes the flow regimes of a data set of 24 centimeter-sized meteoroids for which well-constrained infrasound and photometric information is available. This is the first time that the flow regimes for meteoroids in this size range are validated from observations. From our approach, the Knudsen and Reynolds numbers are calculated, and two different flow regime evaluation approaches are compared in order to validate the theoretical formulation. The results demonstrate that a combination of fluid dynamic dimensionless parameters is needed to allow a better inclusion of the local physical processes of the phenomena. |
Subject: |
meteorites, meteors, meteoroids
planets and satellites: atmospheres shock waves SHOCK-WAVES ATMOSPHERE SPECTRA DENSITY BODIES INFRASOUND ABUNDANCES POROSITIES DYNAMICS ELEMENTS 115 Astronomy, Space science |
Peer reviewed: | Yes |
Rights: | cc_by |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
Total number of downloads: Loading...
Files | Size | Format | View |
---|---|---|---|
Moreno_Ib_ez_2018_ApJ_863_174.pdf | 587.6Kb |
View/ |